package main

import (
	"fmt"
)
func main(){
	var a map[string]int
	fmt.Printf("a:%v\n",a)
	if a == nil{
		a = make(map[string]int,16)
		fmt.Printf("a:%v\n",a)
		a["stu01"] = 1000
		a["stu02"] = 1200
		a["stu03"] = 1300
		fmt.Printf("a:%#v\n",a)
	}
	
}